A direct current switching power supply of an electric sliding door and an electric sliding door controller

Abstract

The utility model provides a kind of DC switching power supply and electric sliding door controller of electric sliding door, including main control circuit, motor drive circuit and switching power supply circuit, switching power supply circuit includes rectifier filter module and high frequency conversion module, width modulation square wave rectifier filter module and sampling comparison modulation module, switching power supply further includes voltage stabilizing module, voltage stabilizing module includes first stabilizer and second stabilizer, the input end of first stabilizer is connected with the output side of width modulation square wave rectifier filter module, the output end of first stabilizer is connected with the input end of second stabilizer, the output end of second stabilizer is connected with the power input end of main control circuit, the output end of first stabilizer is also connected with the power input end of motor drive circuit.Construction is built with 'high frequency conversion+multistage voltage stabilizing' framework, replaces traditional direct power supply, and voltage is adapted for motor, main control respectively, voltage instability problem is solved, and equipment reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric sliding door technology, and in particular to a DC switching power supply and an electric sliding door controller for electric sliding doors. Background Technology

[0002] Electric sliding door systems have become widely used in recent years as a gate control device at the entrances of residential communities and large parks. Sliding doors offer advantages such as large passage space, aesthetically pleasing design, and automatic control. Currently, electric sliding door controllers are typically directly connected to 220V AC power to control the drive motor. However, this power supply method introduces high-voltage electricity into the sliding door body, posing a risk of high-voltage leakage, especially during rainy weather or when the door operator is damaged. To address this, an AC-to-DC converter module has been developed for the electric sliding door controller. However, this module usually uses a toroidal transformer for power supply. To address this, toroidal transformers are typically large and have a narrow applicable voltage range, resulting in a larger controller size and limited voltage range. To further address this, a switching power supply has been used. Switching power supplies typically consist of rectification and filtering, high-frequency conversion, sampling and comparison modulation circuits, and pulse-width modulation (PWM) square wave rectification and filtering to ensure stable output voltage. However, existing switching power supplies often only provide power to the main control circuit and motor after PWM rectification and filtering. This power supply method still results in unstable voltage and may damage the motor and main control circuit. By setting up a switching power supply circuit and using a combination of a first rectifier and filter module, a high-frequency conversion module, and a voltage regulator module, the AC power is converted into DC power suitable for the main control circuit and the motor drive circuit. This solves the problems of large size and narrow applicable voltage range of the toroidal transformer in the prior art, achieving small size, light weight, and wide voltage application range. At the same time, the voltage regulator module ensures stable power supply to the main control circuit through two voltage regulation stages, and the voltage regulator module provides a first voltage regulation output to the motor, which can effectively protect the motor and the main control circuit, and improve the safety and adaptability of the power supply for the electric sliding door. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a DC switching power supply and an electric sliding door controller for electric sliding doors.

[0004] This utility model is implemented using the following method: a DC switching power supply for an electric sliding door, comprising a main control circuit, a motor drive circuit, and a switching power supply circuit. The switching power supply circuit includes a rectifier and filter module, a high-frequency conversion module, a pulse-width modulation (PWM) square wave rectifier and filter module, and a sampling, comparison, and modulation module. The switching power supply also includes a voltage regulator module, which includes a first voltage regulator and a second voltage regulator. The input terminal of the first voltage regulator is connected to the output side of the PWM square wave rectifier and filter module, and the output terminal of the first voltage regulator is connected to the input terminal of the second voltage regulator. The output terminal of the second voltage regulator is connected to the power input terminal of the main control circuit, and the output terminal of the first voltage regulator is also connected to the power input terminal of the motor drive circuit.

[0005] Preferably, the voltage regulator module further includes a capacitor C21. The positive terminal of capacitor C21 is connected to BAT+ on the output side of the pulse-width modulation (PWM) square wave rectifier and filter module. The positive terminal of capacitor C21 is also connected to pin 6 of the first voltage regulator, and the negative terminal of capacitor C21 is connected to BAT- on the output side of the PWM square wave rectifier and filter module. The second pin of the first voltage regulator is connected to one end of inductor L2, and the other end of inductor L2 is connected to the third pin of the second voltage regulator. The other end of inductor L2 is also connected to the output terminal of the motor drive circuit. The other end of inductor L2 is also connected to the positive terminal of capacitor C22, and the negative terminal of capacitor C22 is connected to BAT- on the output side of the PWM square wave rectifier and filter module. The first pin of the second voltage regulator is connected to the power input terminal of the main control circuit and is connected to capacitor C19. The second pin of the second voltage regulator is connected to BAT- on the output side of the PWM square wave rectifier and filter module.

[0006] Preferably, the voltage regulator module further includes a diode D10, the positive terminal of which is connected to the fourth pin and BAT- of the first voltage regulator, and the negative terminal of which is connected to one end of the inductor L2.

[0007] Preferably, the voltage regulator module further includes resistors R30 and R31. One end of resistor R30 is connected to the BAT+ connection on the output side of the pulse width modulation square wave rectifier and filter module. The other end of resistor R30 is connected to the positive terminal of capacitor C21 and one end of resistor R31. The other end of resistor R31 is connected to the first, seventh, and eighth pins of the first voltage regulator. The third pin of the first voltage regulator is connected to one end of capacitor C17. The other end of capacitor C17 is connected to the positive terminal of diode D10.

[0008] Preferably, the fifth pin of the first voltage regulator is connected to one end of resistors R35 and R34, the other end of resistor R35 is connected to BAT- on the output side of the pulse width modulation square wave rectifier filter module, and the other end of resistor R34 is connected to the positive terminal of capacitor C22; a resistor R32 is also connected between the inductor L2 and the third pin of the second voltage regulator; the first voltage regulator is an MC34063 chip, and the second voltage regulator is an ET78L05 chip.

[0009] Preferably, the high-frequency conversion module includes a switching power supply transformer T1A, and the sampling comparison modulation module includes a controller IC1, a sampling circuit, and a MOSFET Q1. The sampling circuit is connected to the output side of the pulse-width modulation (PWM) square wave rectifier and filter module and is used to acquire the voltage at the output side of the PWM square wave rectifier and filter module. The sampling circuit is also connected to the controller IC1 and is used to compare the PWM square wave output voltage with a reference voltage. The controller IC1 is connected to the MOSFET Q1 and is used to control the on / off duration of the MOSFET Q1 according to the comparison result. The MOSFET Q1 is connected to the input side of the switching power supply transformer T1A.

[0010] Preferably, the sampling circuit includes optocoupler IC2, optocoupler IC4, resistor R25, and Zener diode TL1. The BAT+ terminal of the output side of the pulse-width modulation (PWM) square wave rectifier and filter module is connected to one end of resistor R25, and the other end of resistor R25 is connected to the first pin of optocoupler IC2. The BAT- terminal of the output side of the PWM square wave rectifier and filter module is connected to the third pin of Zener diode TL1, and the second pin of Zener diode TL1 is connected to the second pin of optocoupler IC2, for sampling the voltage on the output side of the PWM square wave rectifier and filter module. The fourth pin of optocoupler IC2 is connected to resistor R28. One end of the resistor R28 is connected to the first pin of the controller IC1; the sixth pin of the controller IC1 is connected to the first pin of the MOSFET Q1, the third pin of the controller IC1 is connected to the third pin of the MOSFET Q1, and the second pin of the MOSFET Q1 is connected to the input side of the switching power supply transformer T1A; the second pin of the optocoupler IC4 is connected to the BAT- terminal of the output side of the pulse width modulation square wave rectifier filter module, the first pin of the optocoupler IC4 is connected to the twenty-ninth pin of the main control circuit, and the fourth pin of the optocoupler IC4 is connected to the third pin of the controller IC1.

[0011] Preferably, the first pin of the Zener diode TL1 is connected to the negative terminal of the diode D13, the positive terminal of the diode D13 is connected to the output terminal of the second voltage regulator, and the positive terminal of the diode D13 is connected to the twenty-ninth pin of the main control circuit; a resistor R33 and a resistor R01 are connected in parallel between the third pin and the first pin of the Zener diode TL1.

[0012] Preferably, the rectifier and filter module includes a connector CN1, an inductor L1, and a rectifier bridge REC1. The connector CN1 is connected to an AC power supply. The input terminal of the inductor L1 is connected to the connector CN1. The input terminal of the rectifier bridge REC1 is connected to the output terminal of the inductor L1. The output terminal of the rectifier bridge REC1 is connected to the input side of the high-frequency conversion module.

[0013] An electric sliding door controller includes a DC switching power supply for the electric sliding door as described in any of the preceding claims.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a DC switching power supply and an electric sliding door controller for electric sliding doors. Compared with the prior art, this utility model has at least the following technical effects: 1. By setting up a switching power supply circuit and using a combination of a rectifier filter module, a high-frequency conversion module, and a voltage regulator module, the AC power is converted into DC power suitable for the main control circuit and the motor drive circuit. This solves the problems of large size and narrow applicable voltage range of toroidal transformers in the prior art, achieving small size, light weight, and a wide applicable voltage range. At the same time, the voltage regulator module ensures stable power supply to the main control circuit through two voltage regulation steps, and the voltage regulator module provides a first voltage regulation output power supply to the motor, which can effectively protect the motor and the main control circuit, and improve the safety and adaptability of the power supply for electric sliding doors. 2. The connections of capacitors C21 and C22, inductor L2, and their pins in the voltage regulator module form a filtering and energy freewheeling loop. Capacitor C21 provides initial filtering of the output voltage of the high-frequency conversion module, while inductor L2 and capacitor C22 further smooth the voltage ripple. This multi-stage filtering effectively reduces voltage fluctuations, providing conditions for the stable operation of the first and second voltage regulators, thereby ensuring the stability of the input voltage of the motor drive circuit and the main control circuit, and reducing the impact of voltage fluctuations on the motor and the main control circuit. 3. Diode D10 acts as a freewheeling element in the voltage regulator module. When the operating state of the first voltage regulator changes, the energy stored in inductor L2 can be released through a loop formed by D10, preventing the inductor from generating reverse high voltage that could damage circuit components. This ensures the safety of the internal circuitry of the voltage regulator module and indirectly improves the stability of the power supply to the motor drive circuit, allowing the motor to continuously obtain a stable voltage during operation. 4. The connection of resistors R30 and R31 to the pins of the first voltage regulator provides a suitable bias voltage for the first voltage regulator, ensuring its stable operation in the preset working mode. Simultaneously, the cooperation of resistor and capacitor C17 suppresses high-frequency noise in the circuit, making the input and output voltages of the first voltage regulator more stable, thereby ensuring the stability of the input voltage of the subsequent motor drive circuit and the second voltage regulator. 5. The configuration of controller IC1 and the sampling circuit in the sampling and comparison module enables real-time monitoring of the voltage on the output side of the switching power supply transformer T1A. The sampling circuit acquires the voltage signal and transmits it to controller IC1. Controller IC1 controls the on / off duration of MOSFET Q1 according to the signal, thereby dynamically adjusting the output voltage of the switching power supply transformer T1A. This achieves precise control of the output voltage, allowing the output of the switching power supply to adaptively adjust according to the actual load and input voltage changes, ensuring stable output voltage and solving the problems of untimely and unstable voltage regulation in traditional switching power supplies.6. The connector CN1, inductor L1, and rectifier bridge REC1 in the first rectifier and filter module perform preliminary processing on the input AC power supply; inductor L1 suppresses common-mode interference, reducing the impact of external electromagnetic interference on subsequent circuits; rectifier bridge REC1 converts AC power into pulsating DC power, providing a stable input for the high-frequency conversion module; the stability of the switching power supply circuit is ensured from the power input source, enabling the entire switching power supply to adapt to a wide voltage input of 100-280V, solving the problem of the narrow applicable voltage range of traditional toroidal transformers. Attached Figure Description

[0015] Figure 1 This utility model presents a block diagram illustrating the power supply principle of a DC switching power supply for an electric sliding door, which powers the main control circuit and other components.

[0016] Figure 2 This is a circuit diagram of a DC switching power supply for an electric sliding door according to this utility model.

[0017] Figure 3 This is a circuit block diagram of the main control circuit of this utility model.

[0018] Figure 4 This is a block diagram of the motor drive circuit principle of this utility model.

[0019] Figure 5 This is a circuit block diagram of the status indication part of the motor drive circuit of this utility model.

[0020] Figure 6 This is a circuit diagram illustrating the functional setting circuit of this utility model.

[0021] Figure 7 This is a circuit block diagram of the motor stroke detection of this utility model.

[0022] Figure 8 This is a block diagram of the principle of the soft start and soft stop circuit of this utility model.

[0023] Figure 9 This is the circuit schematic diagram of the external expansion of this utility model.

[0024] Figure 10 This is a circuit block diagram of the remote control signal receiving circuit of this utility model.

[0025] Figure 11 This is the circuit diagram of the alarm circuit of this utility model.

[0026] Figure 12 This is the schematic diagram of the external alarm circuit of this utility model.

[0027] The reference numerals in the attached diagrams are as follows: 1. Main control circuit; 2. Motor drive circuit; 3. Rectifier and filter module; 4. High-frequency conversion module; 5. Width-modulated square wave rectifier and filter module; 6. Sampling, comparison, and modulation module; 7. Voltage regulation module. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Please see Figures 1 to 5 A DC switching power supply for an electric sliding door includes a main control circuit 1, a motor drive circuit 2, and a switching power supply circuit. The switching power supply circuit includes a rectifier and filter module 3, a high-frequency conversion module 4, a pulse-width modulation (PWM) square wave rectifier and filter module 53, and a sampling, comparison, and modulation module 6. The switching power supply also includes a voltage regulator module 7, which includes a first voltage regulator and a second voltage regulator. The input terminal of the first voltage regulator is connected to the output side of the PWM square wave rectifier and filter module 53, and the output terminal of the first voltage regulator is connected to the input terminal of the second voltage regulator. The output terminal of the second voltage regulator is connected to the power input terminal of the main control circuit 1, and the output terminal of the first voltage regulator is also connected to the power input terminal of the motor drive circuit 2. By ensuring a stable power supply to the main control circuit 1 through two voltage regulation steps by the voltage regulator module 7, and by providing a single voltage regulation output to the motor power supply by the voltage regulator module 7, the motor and the main control circuit 1 can be effectively protected. This improves the safety and adaptability of the power supply for the electric sliding door, constructs a "high-frequency conversion + multi-level voltage regulation" architecture, replaces the traditional direct power supply, adapts the voltage for the motor and the main control circuit respectively, solves the problem of voltage instability, and improves the reliability of the equipment.

[0030] Please see Figures 1 to 2Preferably, the voltage regulator module 7 further includes a capacitor C21. The positive terminal of the capacitor C21 is connected to BAT+ on the output side of the pulse-width modulation (PWM) square wave rectifier and filter module 53, the positive terminal of the capacitor C21 is connected to the sixth pin of the first voltage regulator, and the negative terminal of the capacitor C21 is connected to BAT- on the output side of the PWM square wave rectifier and filter module 53. The second pin of the first voltage regulator is connected to one end of the inductor L2, the other end of the inductor L2 is connected to the third pin of the second voltage regulator, the other end of the inductor L2 is connected to the output terminal of the motor drive circuit 2, and the other end of the inductor L2 is also connected to the positive terminal of the capacitor C22. The negative terminal of the capacitor C22 is connected to BAT- on the output side of the PWM square wave rectifier and filter module 53. The first pin of the second voltage regulator is connected to the power input terminal of the main control circuit 1 and is connected to a capacitor C19. The second pin of the second voltage regulator is connected to BAT- on the output side of the PWM square wave rectifier and filter module 53. Capacitor C21 performs initial filtering on the output voltage of the high-frequency conversion module 4, while inductor L2 and capacitor C22 further smooth the voltage ripple. This multi-stage filtering effectively reduces voltage fluctuations, providing conditions for the stable operation of the first and second voltage regulators, thereby ensuring the stability of the input voltage of the motor drive circuit 2 and the main control circuit 1, and reducing the impact of voltage fluctuations on the motor and the main control circuit 1.

[0031] Please see Figures 1 to 2 Preferably, the voltage regulator module 7 further includes a diode D10. The anode of the diode D10 is connected to pin 4 of the first voltage regulator and BAT-, and the cathode of the diode D10 is connected to one end of the inductor L2. The diode D10 serves as a freewheeling diode in the voltage regulator module 7. When the operating state of the first voltage regulator changes, the energy stored in the inductor L2 can be released through a loop formed by D10, preventing the inductor from generating reverse high voltage that could damage circuit components. This ensures the safety of the internal circuitry of the voltage regulator module 7 and indirectly improves the stability of the power supply to the motor drive circuit 2, allowing the motor to continuously obtain a stable voltage during operation.

[0032] Please see Figures 1 to 2Preferably, the voltage regulator module 7 further includes resistors R30 and R31. One end of resistor R30 is connected to the BAT+ connection on the output side of the pulse-width modulation square wave rectifier and filter module 53. The other end of resistor R30 is connected to the positive terminal of capacitor C21 and one end of resistor R31. The other end of resistor R31 is connected to pins 1, 7, and 8 of the first voltage regulator. Pin 3 of the first voltage regulator is connected to one end of capacitor C17, and the other end of capacitor C17 is connected to the positive terminal of diode D10. The connection of resistors R30 and R31 to the pins of the first voltage regulator provides a suitable bias voltage for the first voltage regulator, ensuring its stable operation in the preset operating mode. At the same time, the cooperation of resistors and capacitor C17 can suppress high-frequency noise in the circuit, making the input and output voltage of the first voltage regulator more stable, thereby ensuring the stability of the input voltage of the subsequent motor drive circuit 2 and the second voltage regulator.

[0033] Please see Figures 1 to 2 Preferably, the fifth pin of the first voltage regulator is connected to one end of resistors R35 and R34, the other end of resistor R35 is connected to BAT- on the output side of the pulse-width modulation (PWM) square wave rectifier filter module 53, and the other end of resistor R34 is connected to the positive terminal of capacitor C22; a resistor R32 is also connected between the inductor L2 and the third pin of the second voltage regulator; the first voltage regulator is an MC34063 chip, and the second voltage regulator is an ET78L05 chip. The MC34063 chip has the characteristics of high-efficiency step-down and wide voltage adaptation, and can handle the voltage output of the PWM square wave rectifier filter module 53 well, providing a stable voltage for the motor drive circuit 2; the ET78L05 chip, as a linear voltage regulator, has low output ripple and can provide high-precision, low-noise power supply for the main control circuit 1. The two work together to achieve a multi-stage voltage regulation effect of "high-efficiency step-down + precise voltage regulation", meeting the voltage requirements of different circuit modules. The setting of resistors R32, R34, R35, etc., further optimizes the current and voltage parameters in the voltage regulation process, ensuring the accuracy of voltage regulation.

[0034] Please see Figures 1 to 2Preferably, the high-frequency conversion module 4 includes a switching power supply transformer T1A, and the sampling comparison modulation module 6 includes a controller IC1, a sampling circuit, and a MOSFET Q1. The sampling circuit is connected to the output side of the pulse-width modulation (PWM) square wave rectifier and filter module 53 to collect the voltage at the output side of the PWM square wave rectifier and filter module 53. The sampling circuit is also connected to the controller IC1 to compare the PWM square wave output voltage with a reference voltage. The controller IC1 is connected to the MOSFET Q1 to control the on / off duration of the MOSFET Q1 based on the comparison result. The MOSFET Q1 is connected to the input side of the switching power supply transformer T1A. The sampling circuit collects the voltage signal and transmits it to the controller IC1. The controller IC1 controls the on / off duration of the MOSFET Q1 according to the signal, thereby dynamically adjusting the output voltage of the switching power supply transformer T1A. The voltage is then input to the PWM square wave rectifier and filter module 53 for rectification and filtering to output a 27.3V voltage, ensuring the stability of the output voltage. This achieves precise control of the output voltage, allowing the switching power supply's output to adaptively adjust according to actual load conditions and input voltage changes, ensuring stable output voltage and solving the problems of untimely and unstable voltage regulation in traditional switching power supplies. The second pin of MOSFET Q1 is connected to the primary winding of the switching power supply transformer T1A. The secondary winding of the switching power supply transformer T1A is connected to the input side of the pulse-width modulation (PWM) square wave rectifier and filter module 53. The PWM square wave rectifier and filter module 53 includes diodes D1B / D1A and parallel resistor R1 and capacitor C1. See details... Figure 2 .

[0035] Please see Figures 1 to 2Preferably, the sampling circuit includes optocoupler IC2, optocoupler IC4, resistor R25, and Zener diode TL1. The BAT+ terminal of the output side of the pulse-width modulation (PWM) square wave rectifier and filter module 53 is connected to one end of resistor R25, and the other end of resistor R25 is connected to the first pin of optocoupler IC2. The BAT- terminal of the output side of the PWM square wave rectifier and filter module 53 is connected to the third pin of Zener diode TL1, and the second pin of Zener diode TL1 is connected to the second pin of optocoupler IC2 for sampling the voltage on the output side of the PWM square wave rectifier and filter module 53. The fourth pin of optocoupler IC2 is connected to resistor R25. One end of resistor R28 is connected to pin 1 of controller IC1; pin 6 of controller IC1 is connected to pin 1 of MOSFET Q1, pin 3 of controller IC1 is connected to pin 3 of MOSFET Q1, and pin 2 of MOSFET Q1 is connected to the input side of switching power supply transformer T1A; pin 2 of optocoupler IC4 is connected to the BAT- terminal of the output side of the pulse-width modulation (PWM) rectifier filter module 53, pin 1 of optocoupler IC4 is connected to pin 29 of main control circuit 1, and pin 4 of optocoupler IC4 is connected to pin 3 of controller IC1. In the sampling circuit, optocouplers IC2 and IC4 achieve electrical isolation between the high-voltage side (output side of PWM rectifier filter module 53) and the low-voltage control side (controller IC1), preventing high-voltage interference to main control circuit 1 and ensuring the safety of the control circuit. Zener diode TL1 provides a stable reference voltage, which is compared with the sampling voltage to ensure sampling accuracy. The proper coordination of resistors R25 and R28, etc., ensures a reasonable distribution of voltage and current, enabling the sampled signal to accurately reflect the output voltage. This provides a reliable basis for controller IC1 to adjust MOSFET Q1, improving the stability and accuracy of voltage regulation. The UC3845 chip is a preferred choice for IC1.

[0036] Please see Figures 1 to 2 Preferably, the first pin of the Zener diode TL1 is connected to the negative terminal of diode D13, the positive terminal of diode D13 is connected to the output terminal of the second voltage regulator, and the positive terminal of diode D13 is connected to the twenty-ninth pin of the main control circuit 1. Resistors R33 and R01 are connected in parallel between the third pin of the Zener diode TL1 and the first pin. The connection of the Zener diode TL1 with diode D13, resistors R33 and R01 further optimizes the sampling and feedback circuit. Diode D13 prevents reverse voltage from impacting the output terminals of the main control circuit 1 and the second voltage regulator, ensuring circuit safety. The parallel connection of resistors R33, R01, and TL1 adjusts the operating state of the Zener diode, making the sampling voltage more stable and accurate, improving the reliability of the entire sampling and feedback loop, and thus ensuring the stability of the switching power supply output voltage. A resistor R50 is connected in series between the positive terminal of diode D13 and the output terminal of the second voltage regulator.

[0037] Please see Figures 1 to 2 Preferably, a resistor R49 is connected in series with the negative terminal of diode D13. The other end of resistor R49 is connected to the first pin of Zener diode TL1. Resistors R23 and R27 are connected in series between the other end of resistor R49 and BAT+. Capacitors C14 and C16 are also connected to the other end of resistor R49. The other end of capacitor C14 is connected to the second pin of optocoupler IC2. The other end of capacitor C16 is connected to resistor R29. The other end of resistor R29 is connected to the second pin of optocoupler IC2. A sliding resistor RT1 is connected in parallel with resistor R27.

[0038] Please see Figures 1 to 2 Preferably, the rectifier-filter module 3 includes a connector CN1, an inductor L1, and a rectifier bridge REC1. The connector CN1 connects to the AC power supply, the input terminal of the inductor L1 is connected to the connector CN1, the input terminal of the rectifier bridge REC1 is connected to the output terminal of the inductor L1, and the output terminal of the rectifier bridge REC1 is connected to the input side of the high-frequency conversion module 4. The connector CN1, inductor L1, and rectifier bridge REC1 in the first rectifier-filter module 3 provide preliminary processing of the input AC power supply. The inductor L1 suppresses common-mode interference, reducing the impact of external electromagnetic interference on subsequent circuits; the rectifier bridge REC1 converts AC power into pulsating DC power, providing a stable input for the high-frequency conversion module 4. This ensures the stability of the switching power supply circuit from the power input source, enabling the entire switching power supply to adapt to a wide voltage input range of 100-280V, solving the problem of the narrow applicable voltage range of traditional toroidal transformers.

[0039] Please see Figures 1 to 12 An electric sliding door controller includes a DC switching power supply for the electric sliding door as described in any of the preceding claims. The electric sliding door, using the aforementioned DC switching power supply, can obtain a stable, safe, and wide-range adaptable power supply. This solves the problems of high-voltage leakage risk, easy equipment damage, and narrow applicable voltage range caused by power supply issues in existing electric sliding doors, ensuring stable operation of the electric sliding door in different environments (such as different grid voltages, rainy weather, etc.), and improving the overall performance and reliability of the electric sliding door. It also features motor travel detection (see...). Figure 7 ), soft start / stop circuit and motor current sampling (see) Figure 8 The current is collected via constantan wire and transmitted to the MCU (main control circuit 1) for comparison with the standard value. The MCU then outputs a PWM signal to adjust the motor speed. An alarm circuit and a remote control signal receiver are also included. (See...) Figure 10 ), Function settings (see Figure 6 ), and external modules for infrared obstacle detection, facial recognition and fingerprint card swiping, manual buttons, etc. (see Figure 9 Motor stroke detection (see) Figure 7It has two interfaces for connecting external Hall effect sensors, reed switch sensors, magnets, and other detection and limit switches; either interface can be used with any two detection circuits. The alarm circuit includes a buzzer alarm module (see...). Figure 11 It also has an external interface (see) Figure 12 It can be used to connect to external alarms, horns, and flashlights.

[0040] The working principle of this utility model is as follows:

[0041] AC power input and preprocessing: AC power is connected via connector CN1, inductor L1 suppresses common-mode interference, rectifier bridge REC1 converts AC power into pulsating DC power, and inputs to the primary side of switching power supply transformer T1A.

[0042] High-frequency conversion and voltage regulation: MOSFET Q1 is controlled by controller IC1 to frequently switch the primary current of T1A on and off. In the sampling circuit, optocouplers IC2 and IC4, together with Zener diode TL1, monitor the output voltage of the pulse-width modulation (PWM) square wave rectifier and filter module 53 in real time. IC1 adjusts the on / off duration of Q1 based on the sampling signal, dynamically adjusting the output voltage of T1A, and outputting a 27.3V voltage after rectification and filtering by the PWM square wave rectifier and filter module 53.

[0043] Multi-stage voltage regulation and power supply: The output voltage of the switching power supply transformer T1A is rectified and filtered by the width-sensitivity square wave rectifier and filter module 53 to output a voltage of 27.3V. This voltage is then input to the first voltage regulator (MC34063) for switching regulation, and then filtered by inductor L2 and capacitor C22 to output a 12V voltage for the motor drive circuit 2. Simultaneously, the 12V voltage is linearly regulated by the second voltage regulator (ET78L05) and filtered by capacitor C19 to output a 5V voltage for the main control circuit 1. Components such as diode D10 and resistor R30 assist in voltage regulation to ensure voltage stability.

[0044] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0045] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0046] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0047] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A DC switching power supply for an electric sliding door, comprising a main control circuit, a motor drive circuit, and a switching power supply circuit, wherein the switching power supply circuit includes a rectifier and filter module, a high-frequency conversion module, a pulse-width modulation (PWM) square wave rectifier and filter module, and a sampling, comparison, and modulation module, characterized in that: The switching power supply also includes a voltage regulator module, which includes a first voltage regulator and a second voltage regulator. The input terminal of the first voltage regulator is connected to the output side of the pulse width modulation square wave rectifier and filter module. The output terminal of the first voltage regulator is connected to the input terminal of the second voltage regulator. The output terminal of the second voltage regulator is connected to the power input terminal of the main control circuit. The output terminal of the first voltage regulator is also connected to the power input terminal of the motor drive circuit.

2. The DC switching power supply for an electric sliding door according to claim 1, characterized in that: The voltage regulator module also includes a capacitor C21. The positive terminal of capacitor C21 is connected to BAT+ on the output side of the pulse-width modulation (PWM) square wave rectifier and filter module. The positive terminal of capacitor C21 is also connected to pin 6 of the first voltage regulator, and the negative terminal of capacitor C21 is connected to BAT- on the output side of the PWM square wave rectifier and filter module. The second pin of the first voltage regulator is connected to one end of inductor L2, and the other end of inductor L2 is connected to the third pin of the second voltage regulator. The other end of inductor L2 is also connected to the output terminal of the motor drive circuit. The other end of inductor L2 is also connected to the positive terminal of capacitor C22, and the negative terminal of capacitor C22 is connected to BAT- on the output side of the PWM square wave rectifier and filter module. The first pin of the second voltage regulator is connected to the power input terminal of the main control circuit and is connected to capacitor C19. The second pin of the second voltage regulator is connected to BAT- on the output side of the PWM square wave rectifier and filter module.

3. The DC switching power supply for an electric sliding door according to claim 2, characterized in that: The voltage regulator module also includes a diode D10, the positive terminal of which is connected to the fourth pin and BAT- of the first voltage regulator, and the negative terminal of which is connected to one end of the inductor L2.

4. The DC switching power supply for an electric sliding door according to claim 3, characterized in that: The voltage regulator module also includes resistors R30 and R31. One end of resistor R30 is connected to the BAT+ connection on the output side of the pulse width modulation square wave rectifier and filter module. The other end of resistor R30 is connected to the positive terminal of capacitor C21 and one end of resistor R31. The other end of resistor R31 is connected to the first, seventh, and eighth pins of the first voltage regulator. The third pin of the first voltage regulator is connected to one end of capacitor C17. The other end of capacitor C17 is connected to the positive terminal of diode D10.

5. The DC switching power supply for an electric sliding door according to claim 4, characterized in that: The fifth pin of the first voltage regulator is connected to one end of resistors R35 and R34. The other end of resistor R35 is connected to BAT- on the output side of the pulse width modulation square wave rectifier filter module, and the other end of resistor R34 is connected to the positive terminal of capacitor C22. Resistor R32 is also connected between inductor L2 and the third pin of the second voltage regulator. The first voltage regulator is an MC34063 chip, and the second voltage regulator is an ET78L05 chip.

6. The DC switching power supply for an electric sliding door according to claim 1, characterized in that: The high-frequency conversion module includes a switching power supply transformer T1A. The sampling comparison modulation module includes a controller IC1, a sampling circuit, and a MOSFET Q1. The sampling circuit is connected to the output side of the pulse-width modulation (PWM) square wave rectifier and filter module and is used to acquire the voltage at the output side of the PWM square wave rectifier and filter module. The sampling circuit is also connected to the controller IC1 and is used to compare the PWM square wave output voltage with a reference voltage. The controller IC1 is connected to the MOSFET Q1 and is used to control the on / off duration of the MOSFET Q1 according to the comparison result. The MOSFET Q1 is connected to the input side of the switching power supply transformer T1A.

7. The DC switching power supply for an electric sliding door according to claim 6, characterized in that: The sampling circuit includes optocoupler IC2, optocoupler IC4, resistor R25, and Zener diode TL1. The BAT+ terminal of the output side of the pulse-width modulation (PWM) rectifier filter module is connected to one end of resistor R25, and the other end of resistor R25 is connected to the first pin of optocoupler IC2. The BAT- terminal of the output side of the PWM rectifier filter module is connected to the third pin of Zener diode TL1, and the second pin of Zener diode TL1 is connected to the second pin of optocoupler IC2. This circuit is used to sample the voltage on the output side of the PWM rectifier filter module. The fourth pin of optocoupler IC2 is connected to one end of resistor R28, and the other end of resistor R28 is connected to the first pin of controller IC1. The sixth pin of the controller IC1 is connected to the first pin of the MOSFET Q1, the third pin of the controller IC1 is connected to the third pin of the MOSFET Q1, and the second pin of the MOSFET Q1 is connected to the input side of the switching power supply transformer T1A. The second pin of the optocoupler IC4 is connected to the BAT- terminal on the output side of the pulse width modulation square wave rectifier and filter module, the first pin of the optocoupler IC4 is connected to the twenty-ninth pin of the main control circuit, and the fourth pin of the optocoupler IC4 is connected to the third pin of the controller IC1.

8. The DC switching power supply for an electric sliding door according to claim 7, characterized in that: The first pin of the Zener diode TL1 is connected to the negative terminal of the diode D13, the positive terminal of the diode D13 is connected to the output terminal of the second voltage regulator, and the positive terminal of the diode D13 is connected to the twenty-ninth pin of the main control circuit; a resistor R33 and a resistor R01 are connected in parallel between the third pin and the first pin of the Zener diode TL1.

9. The DC switching power supply for an electric sliding door according to claim 1, characterized in that: The rectifier and filter module includes a connector CN1, an inductor L1, and a rectifier bridge REC1. The connector CN1 is connected to an AC power supply. The input terminal of the inductor L1 is connected to the connector CN1. The input terminal of the rectifier bridge REC1 is connected to the output terminal of the inductor L1. The output terminal of the rectifier bridge REC1 is connected to the input side of the high-frequency conversion module.

10. An electric sliding door controller, characterized in that: The DC switching power supply includes the electric sliding door as described in any one of claims 1-9.

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